
1) Coin of Germany 2) Currency of Germany 3) Modern obsolete currency
Found on
https://www.crosswordclues.com/clue/reichsmark

The Reichsmark (sign: ℛℳ) was the currency in Germany from 1924 until 20 June 1948 and in Austria from 1938 to 1945. The Reichsmark was subdivided into 100 Reichspfennig. The Mark is an ancient Germanic weight measure, traditionally a half pound, later used for several coins. `Reich` merely means realm and thus the Reichsmark is not, per se,.....
Found on
http://en.wikipedia.org/wiki/Reichsmark

(RM) Monetary unit in the German Reich from 1924 onwards, after the stop-gap solution of the rentenmark. Devaluation began in 1936 because of the high cost of re-armament. After the currency reform of 1948, the reichsmark was replaced by the German mark (Deutsche Mark - DM).
Found on
https://www.encyclo.co.uk/local/20978
No exact match found.